JPS6047366B2 - Web dotting device for cards - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD This invention relates to a top ink device for stabilizing web running on cards.

Prior art methods for increasing the productivity of cards include ejecting the web with a heavy gel, but generally the method used is to increase the speed of the dossier.

When increasing the speed of the dosing, it is necessary to correspondingly increase the speed of the top ink. In the method of using a fly comb, which has been used for a long time to strip the web from dots fur, it is technically difficult to make the fly comb work with high-speed vibration, and even if it were to work with high-speed vibration, Even if it were possible to do so, it would be very difficult to increase the speed because the web stripping would be intermittent due to the vertical vibration of the fly comb, and the alignment state of the fibers would be greatly disturbed by the turbulent flow caused by the vibration.

Therefore, an apparatus described in Japanese Patent Publication No. 53-11564 was proposed which uses a stripping roller instead of a fly comb as a means for stripping the web W from the paper.

As shown in FIG. 1, this device has a stripping roller 2 provided close to the circumferential surface of a dolpher 1, and a pair of pressure rollers 3 and 4 disposed next to the stripping roller 1. The web W sent out from the pressure rollers 3 and 4 passes through a trumpet 5 and a pair of calender rollers 6 and 7.
The sliver S is formed through the sliver S. By using the stripping roller 2, card productivity was improved compared to when a fly comb was used. However, with this device, the leading edge of the web W may fall downward from the stripping roller 2 without reaching the pair of pressure rollers 3 and 4 when the card is kissed, that is, at the time of first spinning, or air resistance during high-speed running may occur. The increase in centrifugal force caused the inconvenience that the web W was disturbed, cut, and fell. In order to improve this drawback, for example, Japanese Patent Application Laid-Open No. 51-4712
The device described in 0 was proposed. As shown in FIG. 2, this device includes a pair of upper and lower pressure rollers 3 and 4, in which the upper pressure roller 3 is arranged so that its axial center is below the axial center of the stripping roller 2. A lower pressure roller 4 is disposed on the lower peripheral surface side of the stripping roller 2. In this device, even if the web w stripped from the stripping roller 2 tries to fall before being guided between the pressure rollers 3 and 4, the web W is supported by the upper peripheral surface of the lower pressure roller 4. and is guided between the upper and lower pressure rollers 3 and 4 by the rotating action of the lower pressure roller 4. However, with the apparatus configured as described above, the production amount is 1001.
For high production cards of b/Hr or more, pressure roller 3,
4. The running of the web W between the trumpets 5 becomes unstable due to the straightness due to air resistance and high speed, and spinning becomes impossible.

In the apparatus described in Japanese Patent Publication No. 49-30008 shown in FIG. A guide plate 9 extending diagonally downward is provided to guide the web W using its own weight, and a pair of calender rollers 6 and 7 provided at the lower end of the guide plate 9 turn the web W into a sliver S, and then the coiler By configuring the web W to be guided to the can 11 via the web W, it is possible to prevent the web W from falling, and
It also measures the running stability of the web.

However, when trying to stabilize the running of the web W by using the web W's own weight, the running direction of the web W becomes downward.
Coiler 10 of sliver S coming out from calender rollers 6 and 7
As the distance traveled increases, supply becomes more difficult. That is, the sliver S is likely to be cut at the point where the direction of the sliver S is changed upward to feed the sliver S from the calender rollers 6 and 7 to the coiler 10 over the shortest distance. In order to prevent this, a traveling guide device for the sliver S must be provided, which complicates the structure. In addition, since the web W runs on the guide plate 9 until it is guided to the calender rollers 6 and 7, during high-speed running, the web W is affected by the accompanying airflow, the resistance of the guide plate 9, and the fruit dregs that accumulate on the guide plate 9. Driving becomes unstable due to the influence of leaf debris, etc. Therefore, in order to cope with the increase in the speed of dotting, a dotting device has been proposed in which a web converging device is provided between the pressure rollers 3 and 4 and the calender rollers 6 and 7.

For example, in the apparatus described in JP-A-48-50029, a fixed wall 12 extending parallel to the axial direction of the pressure rollers 3, 4 is provided as shown in FIGS. The web W collides with the fixed wall 12, changes its direction, and is guided along the fixed wall 12 to the calender rollers 6, 7. Also, JP-A-55-40894
As shown in FIGS. 6 and 7, an opening 13a is provided between the pressure rollers 3, 4 and the calendar rollers 6, 7.
The guide member 13, the trumpet 5, and the calender rollers 6, 7 are shown in chain lines in FIG. It is located away from the pressure rollers 3 and 4, as shown by the solid line, and is configured to move to a position close to the pressure rollers 3 and 4, as shown by the solid line, when the speed reaches high speed. In these focusing devices, the web W sent out from the pressure rollers 3 and 4 collides with the fixed wall 12 or the guide member 13 and changes its traveling direction by 90 degrees, so the speed can be increased for the following reasons. It comes with difficulties.

(a) Since the traveling direction of the web W is changed by 90 degrees, the directionality of the fibers is disturbed.

(b) It is difficult to process the accompanying air current of the web W.

(c) High-precision wall surface finish is required.

(d) If dirt or cotton wax adheres to the inner surface of the wall, it will be greatly affected, causing the running speed of the web W to drop and the directionality of the fibers to be disturbed. (E) It is necessary to equip a scraper 14 to prevent fibers from adhering to the pressure rollers 3 and 4;
The focusing performance is greatly influenced by the fibers accumulated between the pressure rollers 3, 4 and the scraper 14 and the cotton wax adhering to the pressure rollers 3, 4.

In addition, in the apparatus shown in FIGS. 4 and 5, the upper part of the fixed wall 12 is wide so that the web W sent out from the pressure rollers 3 and 4 during kissing can be collected by hand and guided to the calender rollers 6 and 7. Since it is open, there is a drawback that the directionality of the fibers is significantly disturbed, and in the apparatus shown in FIGS. The structure becomes complicated and the manufacturing cost increases.

As shown in FIG. 8 and FIGS. 9 and 10 as a web speed collection device, an endless belt device 15 having a running section extending parallel to the axis of the pressure rollers 3 and 4 and a pressure roller 16 are used as a pressure roller. 3 and 4, the endless belt 15a receives the web W sent out from the pressure rollers 3 and 4, transfers the web by changing its traveling direction by 90 degrees, and transfers the web W sent out from the pressure rollers 3 and 4 by the pressure roller 16 at one end of the endless belt 15a. A configuration in which the sliver S is pressed and sent out as a sliver S has also been proposed. However, these devices also have a structure in which the traveling direction of the web W is changed by 90 degrees, so problems such as disturbance of fiber direction and treatment of accompanying airflow cannot be solved, and the mechanism is becomes extremely complex. OBJECT This invention has been made in order to eliminate the above-mentioned conventional defects, and its purpose is to provide a doffing device for stabilizing the running of a web in a card, in which the running of the web is not disturbed even when doffing is performed at high speed. There is a particular thing.

EXAMPLE An example embodying the present invention will be described below with reference to FIGS. 11 and 12.

A stripping roller 22 for stripping the fibers on the doffer 21 is provided above the axis of the doffer 21 and close to the circumferential surface of the doffer 21. The surface of the stripping roller 22 is coated with a metallic wire, or is formed by machining so as to have the same effect as a metallic wire, and is equipped with a mechanical stripping means. The carrier roller 23, which has a smooth surface, is a stripping roller. It has a narrow gap with respect to the fiber 22, and the fiber 21 is provided with a narrow gap as much as possible without affecting the fibers on the circumferential surface of the fiber 21.
The stripping roller 22 is disposed below the stripping roller 22 so as to be close to the stripping roller 22. Above the carrier roller 23 is a web guide roller 24 that prevents the web W from wrapping around the soot stripping roller 22 and sends the web W forward.
3 and are arranged with a narrow gap. However, it is not necessarily necessary to leave a gap between the carrier rollers 23 and the carrier rollers 23, and they may be provided so as to press the web W against the carrier rollers 23. The surface of the web guide roller 24 may be smooth or uneven; however, unevenness is effective in making it easier to strip the web W from the stripping roller 22, and in order to make it easier to feed out the web W, the surface of the carrier roller 24 should be smooth and uneven. It is desirable to crimp it. In front of the carrier roller 23, following the trumpet 25, a pair of calender rollers 26 and 27 are provided, which rotate at a faster speed than the carrier roller 23. Note that a scraper 28 may be provided below the carrier roller 23 to remove debris, cotton wax, etc. attached to the carrier roller 23. Next, the operation of the doffing device configured as described above will be explained.

In FIG. 11, the fibers on the circumferential surface of the dolpher 21 rotating clockwise are stripped off as a web W by a stripping roller 22 which also rotates clockwise like the doffer 21. The stripped web W is transferred by the carrier roller 23 and the web guide roller 24 in the rotational direction of the carrier roller 23. Even if the web w hangs down from the stripping roller 22 during kissing, etc., the carrier roller 23 will keep the web w from the stripping roller 21 and the stripping roller 2.
2, the web W is received by the upper peripheral surface of the carrier roller 23, prevented from falling, and carried upward. Carrier roller 2
The web W transported by the sliver 3 is collected by the trumpet 25 and then compressed by the calender rollers 26 and 27 into a single sliver S.

Since the web W is given tension by the pulling action of the calender rollers 26 and 27, the plane including the trumpet 25 separates from the carrier roller 23 at the portion where it contacts the circumferential surface of the carrier roller 23, and comes to float. Web W
is mainly focused in the area A1 between the carrier roller 23 and the trumpet 25, but the area A1 that is closer to the area A1 is transferred on the surface of the carrier roller 23 as the carrier roller 23 rotates. Since the fibers are preliminarily narrowed in A2 due to frictional resistance with the carrier roller 23, there is no strain on the convergence in area A1, and there is little disturbance in the directionality of the fibers. The web W, which is wide and thin and susceptible to the influence of accompanying airflow during high-speed running, is transferred as the carrier roller 23 rotates while being placed on the surface of the carrier roller 23 as described above.

Therefore, even when traveling at high speed, the frictional resistance with the carrier roller 23 suppresses disturbance of the web W due to air resistance, and the web W is transported in a stable state. Further, after leaving the carrier roller 23 and being guided to the trumpet 25 and calender rollers 26 and 27, the web W is narrowly gathered and tension is applied to the web W by the calender rollers 26 and 27, so that a slight draft is applied to the web W. Even at high speeds, the web W leaves the carrier 23 without being carried away while being attached to the carrier roller 23, and runs in a stable state almost unaffected by accompanying airflow. It should be noted that the present invention is not limited to the above-mentioned embodiments, and the shape, structure, etc. of each part can be arbitrarily changed without departing from the spirit of the present invention.

Effects As described in detail above, this invention transfers the web stripped from the document by the stripping roller onto the surface of the carrier roller, which has a smooth surface, and also transfers the web to the carrier roller and the calender roller by the calender roller. The web is tensioned between There is little disturbance in the directionality of the web, and the web can run stably without being disturbed by the influence of accompanying air currents, etc. Also, since the web is carried on carrier rollers, it has good operability. Since the visible range of the web running is wide, it has an excellent effect of being convenient for operation management.

[Brief Description of the Drawings] Figures 1 to 4 are side views showing various conventional devices, Figure 5 is a partial front view of the device shown in Figure 4, and Figure 6 is a main part of another conventional device. 7 is a partially cutaway front view showing the main parts of the device shown in FIG. 6, FIG. 8 is a perspective view of another conventional device, and FIG. 9 is another conventional device. Side view, 1st
0 is a plan view of the same device, FIG. 11 is a side view showing an embodiment embodying the present invention, and FIG. 12 is a view taken from the direction of arrow C in FIG. 11. Document fur 21, stripping roller 22, carrier roller 23, web guide roller 24, trumpet 2
5, calendar rollers 26, 27, web W, sliver S
.

Claims (1)

[Claims] 1 A stripping roller provided close to the circumferential surface of the dosing fur and having mechanical stripping means on its surface, and a stripping roller provided close to and below the stripping roller to remove the web stripped by the stripping roller. a carrier roller having a smooth surface for transporting the strips; a web guide roller disposed above the carrier roller and close to the stripping roller; and a web guide roller disposed in front of the carrier roller together with a trumpet; 1. A web doffing device for cards, comprising: a pair of calender rollers having a surface speed faster than that of a card web doffing device.